You really gotta work with MB Quart tweets. Put them in the pillars and they'll blow your head off. Take some time, and they'll work for ya. After using them for many years, i've managed to get them down to a point where a usual mb quart hater told me "you need to bring your tweets up some". Biamping is an easy way to tame them. Off axis low in kicks or something works well also. Thats where i have my PSD tweets now, and they're not too harsh at all, and they arent even biamped. I think the work i put forth to get them right was well worth it. Give them a shot.